Consider the proposed formal charges for the molecule MX20 below. Which of the following options are possible?
Option #1: All atoms have formal charges of zero.
Option #2: The Mand X atoms have a formal charge of zero. O has a formal charge of -1.
Option #3: The M and X atoms have a formal charge of zero. O has a formal charge of -2.
Option #4: Both X atoms have a formal charge of +1. O has a formal charge of -1. M has a formal charge of -1.